Prism apparatus applied to periscope lens module and periscope lens module

ABSTRACT

Provided are a prism apparatus applied to a periscope lens module and a periscope lens module. The prism apparatus includes a bearing frame; a supporting-restoring assembly rotatably mounted on the bearing frame; a prism rotatable with the supporting-restoring assembly; and shape memory alloy wires configured to drive the supporting-restoring assembly and the prism to rotate with respect to the bearing frame. The supporting-restoring assembly includes a shape memory alloy wire-supporting frame rotatably connected to the bearing frame, and an elastic support member elastically connected to the bearing frame. The prism is mounted on the elastic support member. The shape memory alloy wires are connected between the bearing frame and the shape memory alloy wire-supporting frame. In the present invention, the shape memory alloy wires replace the electromagnetic drive and are used to drive the supporting-restoring assembly to rotate relative to the bearing frame, and the prism can automatically correct angle.

The present invention relates to the field of camera apparatuses, andmore particularly, to a prism apparatus applied to a periscope lensmodule and a periscope lens module including the prism apparatus.

BACKGROUND

A periscope lens module is a lens module having optical zoom completedinside a body thereof. The periscope lens module generally includes alens apparatus, a prism apparatus, and an image sensor. For theperiscope lens module in the related art, optical image stabilization(OIS) for the prism apparatus lies in achieving anti-shake compensationby electromagnetically driving a prism to rotate. That is, an angle ofthe prism is adjusted by a coil and a magnet. Such an adjustmentstructure leads to a high cost and is not suitable for mass production.

Therefore, it is needed to provide a new prism device applied to theperiscope lens module, aiming to solve the problems described above.

SUMMARY

A purpose of the present invention is to provide a prism apparatusapplied to a periscope lens module, which has a low cost at adjusting anangle of the prism inside the lens.

Technical solutions of the present disclosure will be described asbelow.

For achieving the above purpose, the present invention provides a prismapparatus applied to a periscope lens module, including: a bearingframe; a supporting-restoring assembly rotatably mounted on the bearingframe; a prism mounted on the supporting-restoring assembly androtatable with the supporting-restoring assembly; and a plurality ofshape memory alloy wires connected between the bearing frame and thesupporting-restoring assembly and configured to drive thesupporting-restoring assembly and the prism to rotate with respect tothe bearing frame. The supporting-restoring assembly includes a shapememory alloy wire-supporting frame rotatably connected to the bearingframe, and an elastic support member disposed between the shape memoryalloy wire-supporting frame and the prism and elastically connected tothe bearing frame, the prism is mounted on the elastic support member,and the plurality of shape memory alloy wires is connected between thebearing frame and the shape memory alloy wire-supporting frame.

As an improvement, the elastic support member includes an elasticbracket elastically connected to the bearing frame, a holder disposedbetween the elastic bracket and the shape memory alloy wire-supportingframe, and a prism support disposed on a side of the elastic bracketfacing away from the holder, and wherein the prism is mounted on theprism support.

As an improvement, the elastic bracket includes a base plate, and aplurality of elastic arms disposed at outer edges of the base plate andconnected to the bearing frame, and wherein the base plate is sandwichedbetween the holder and the prism support.

As an improvement, each of the plurality of elastic arms includes afirst fixed end fixed to one of the outer edges of the base plate, asecond fixed end configured to be connected to the bearing frame, and anelastic bent portion being bent and connected between the first fixedend and the second fixed end, and wherein the bearing frame is providedwith a snap groove for receiving and locating the second fixed end.

As an improvement, the prism apparatus applied to a periscope lensmodule further includes a ball. The shape memory alloy wire-supportingframe is rotatably connected to the bearing frame through the ball, alocating groove is provided in the bearing frame to receive and locatethe ball, and a spherical arc recess for matching the bass is providedat a side of the shape memory alloy wire-supporting frame facing towardsthe bearing frame.

As an improvement, the shape memory alloy wire-supporting frame includesa main plate body, a spherical arc boss provided at a side of the mainplate body facing towards the prism, a plurality of limiting armsprovided at outer edges of the main plate body and movably snapped andinserted in the bearing frame, and a plurality of terminals provided atthe outer edges of the main plate body and configured to be connected tothe plurality of shape memory alloy wires, and wherein the spherical arcrecess is formed by recessing and extending from a side of the mainplate body facing towards the bearing frame to the spherical arc boss,the holder is provided with a first avoiding hole for avoiding thespherical arc boss, and the elastic bracket is provided with a secondavoiding hole for avoiding the spherical arc boss.

As an improvement, the prism apparatus applied to a periscope lensmodule further includes a magnet. The bearing frame includes a basehaving a cavity and a protrusion provided in the cavity, the locatinggroove is formed in a surface of the protrusion facing towards the shapememory alloy wire-supporting frame, and the protrusion is provided witha mounting groove located between the locating groove and a bottom ofthe protrusion, and wherein the magnet is received and located in themounting groove for attracting and locating the ball and thesupporting-restoring assembly.

As an improvement, the shape memory alloy wire-supporting frame includestwo first side edges that are spaced apart from each other, and twosecond side edges that are spaced apart from and opposite to each otherand are perpendicularly connected to the two first side edges,respectively. The plurality of shape memory alloy wires includes a firstshape memory alloy wire, a second shape memory alloy wire, a third shapememory alloy wire, and a fourth shape memory alloy wire. The first shapememory alloy wire and the second shape memory alloy wire are connectedto the shape memory alloy wire-supporting frame and the bearing framerespectively from the two first side edges, to drive the shape memoryalloy wire-supporting frame to drive the prism to rotate about a firstrotation central axis; and the third shape memory alloy wire and thefourth shape memory alloy wire are connected to the shape memory alloywire-supporting frame and the bearing frame respectively from the twosecond side edges, to drive the shape memory alloy wire-supporting frameto drive the prism to rotate about a second rotation central axis,wherein the first rotation central axis perpendicularly intersects thesecond rotation central axis.

As an improvement, both ends of each of the plurality of shape memoryalloy wires are fixed to the shape memory alloy wire-supporting frame,and a middle portion of each of the plurality of shape memory alloywires is hooked to the bearing frame in such a manner that each of theplurality of shape memory alloy wires is formed into a “V” shape.

The present invention further provides a periscope lens module,including: a shell frame; a lens device mounted to a middle portion ofthe shell frame; an image sensor mounted to an end of the shell frameand located at an image side of the lens device; and the prism apparatusapplied to a periscope lens module as described above. The prismapparatus applied to a periscope lens module is mounted to the other endof the shell frame and located at an object side of the lens device.

The present invention has the following beneficial effects. In thepresent invention, the plurality of shape memory alloy wires is used todrive the prism on the supporting-restoring assembly to rotate withrespect to the bearing frame, such that the prism can automaticallycorrect its angle under the driving of the shape memory alloy wires.Therefore, the prism apparatus applied to a periscope lens module has awider imaging angle and better imaging effect. Moreover, the prismapparatus applied to the periscope lens module uses the shape memoryalloy wires to replace the original electromagnetic drive, which reducesa manufacturing cost of the prism apparatus applied to the periscopelens module, thereby achieving a mass production of the periscope lensmodule.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood withreference to the following drawings. The components in the drawings arenot necessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present invention. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a perspective view of a prism device applied to a periscopelens module according to an embodiment of the present invention.

FIG. 2 is an explosive view of FIG. 1.

FIG. 3 is a front view of a prism device applied to a periscope lensmodule according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view along A-A shown in FIG. 3.

FIG. 5 is a perspective view of a shape memory alloy wire-supportingframe according to an embodiment of the present invention.

FIG. 6 is a perspective view of an elastic bracket according to anembodiment of the present invention.

FIG. 7 is a perspective view of stepped rods being installed into abearing frame according to an embodiment of the present invention.

FIG. 8 is an enlarged view of a structure of part B shown in FIG. 7.

FIG. 9 is an explosive view of FIG. 8.

FIG. 10 is a perspective view of a prism device applied to a periscopelens module according to an embodiment of the present invention afterremoving a prism and an elastic support member.

FIG. 11 is a perspective view of a prism device applied to a periscopelens module according to an embodiment of the present invention afterremoving a prism and a prism support.

FIG. 12 is a perspective view of a periscope lens module according to anembodiment of the present invention.

In the figures:

1: prism device applied to a periscope lens module; 10: bearing frame;11. limiting groove; 111. groove opening; 12. snap groove; 13. base;131. cavity; 132. groove; 133. horizontal support plate; 134. verticalsupport plate; 135. side plate; 14. limiting cover; 141. top limitingplate; 142. side limiting plate; 15. protrusion; 151. inclined surface;152. locating groove; 153. mounting groove; 16. stepped rod; 161. firstlocating rod; 162. second locating rod; 163. third locating rod; 164.first rod body; 165. second rod body; 166. third rod body; 20.supporting-restoring assembly; 21. shape memory alloy wire-supportingframe; 211. limiting arm; 212. first side edge; 213. second side edge;214. main plate body; 215. spherical arc recess; 216. spherical arcboss; 22. elastic support member; 221. elastic bracket; 222. holder;223. prism support; 224. base plate; 225. elastic arm; 226. first fixedend; 227. second fixed end; 228. elastic bent portion; 229. firstavoiding hole; 230. second avoiding hole; 23. connecting terminal; 231.first connecting terminal; 232. second connecting terminal; 233. thirdconnecting terminal; 234. fourth connecting terminal; 30. prism; 40.shape memory alloy wire; 41. first shape memory alloy wire; 42. secondshape memory alloy wire; 43. third shape memory alloy wire; 44. fourthshape memory alloy wire; 50. ball; 60. magnet; 70. shell frame; 80. lensdevice; and 90. image sensor.

DESCRIPTION OF EMBODIMENTS

The present invention will be further described in the following withreference to the accompany drawings and embodiments.

With reference to FIG. 1 to FIG. 11, an embodiment of the presentinvention provides a prism device 1 applied to a periscope lens module.The prism device 1 includes: a bearing frame 10; a supporting-restoringassembly 20 rotatably mounted to the bearing frame 10; a prism 30mounted to the supporting-restoring assembly 20 and rotatable with thesupporting-restoring assembly 20; and a plurality of shape memory alloywires 40 connected between the bearing frame 10 and thesupporting-restoring assembly 20 and for driving thesupporting-restoring assembly 20 and the prism 30 to rotate relative tothe bearing frame 10. The prism 30 mounted to the supporting-restoringassembly 20 can automatically correct an angle under driving of theshape memory alloy wires 40, so that the prism device 1 applied to theperiscope lens module can have a more clear imaging effect.

The supporting-restoring assembly 20 includes a shape memory alloywire-supporting frame 21 rotatably connected to the bearing frame 10,and an elastic support member 22 arranged between the shape memory alloywire-supporting frame 21 and the prism 30 and elastically connected tothe bearing frame 10. The prism 30 is mounted to the elastic supportmember 22, and the shape memory alloy wires 40 are connected between thebearing frame 10 and the shape memory alloy wire-supporting frame 21, soas to drive the shape memory alloy wire-supporting frame 21 to rotaterelative to the bearing frame 10. Two opposite side edges of the shapememory alloy wire-supporting frame 21 are each provided with a pluralityof limiting arms 211, and two opposite sides of the bearing frame 10 areeach provided with a plurality of limiting grooves 11. The limiting arms211 are inserted into the limiting grooves 11 in one to onecorrespondence. The limiting arm 211 is not contact with bottom and sideedges of the corresponding limiting groove 11 to form a certainclearance therebetween, so that the limiting arm 211 and the limitinggroove 11 form a clearance fit. Therefore, the limiting arm 211 ismovable in the limiting groove 11, so that the prism 30 indirectlyconnected to the shape memory alloy wire-supporting frame 21 can rotaterelative to the bearing frame 10 within a certain range, therebypreventing the shape memory alloy wire-supporting frame 21 fromdisengaging from the bearing frame 10. Meanwhile, the limiting groove 11can roughly locate the supporting-restoring assembly 20.

With reference to FIG. 2 and FIG. 6, the elastic support member 22includes an elastic bracket 221 elastically connected to the bearingframe 10, a holder 222 arranged between the elastic bracket 221 and theshape memory alloy wire-supporting frame 21, and a prism support 223arranged at a side of the elastic bracket 221 facing away from theholder 222. The elastic bracket 221 includes a base plate 224, and aplurality of elastic arms 225 disposed at an outer edge of the baseplate 224 and connected to the bearing frame 10. The base plate 224 issandwiched between the holder 222 and the prism support 223. The prism30 is mounted to the prism support 223. As an example, the prism 30 isglued to the prism support 223.

For example, the elastic arm 225 includes a first fixed end 226 fixed tothe outer edge of the base plate 224, a second fixed end 227 connectedto the bearing frame 10, and an elastic bent portion 228 bent andconnected between the first fixed end 226 and the second fixed end 227.The bearing frame 10 is provided with a snap groove 12 for receiving andlocating the second fixed end 227. The elastic bracket 221 iselectrically connected to the bearing frame 10. In specificapplications, a structure of the elastic arm 225 is not limited to this.

With further reference to FIG. 7 to FIG. 9, in this embodiment, thebearing frame 10 includes a base 13 having a cavity 131, and a pluralityof limiting covers 14. Two opposite side edges of the base 13 are eachprovided with a plurality of grooves 132. The limiting covers 14 coverand are mounted to the grooves 132 in one-to-one correspondence, so asto form the limiting grooves 11 described above. Each limiting groove 11has a groove opening 111 open towards the cavity 131, and the limitingarm 211 is inserted into the groove opening 111 and moves in the grooveopening 111. In this way, the limiting arm 211 and the limiting groove11 form the above-mentioned clearance fit.

The limiting cover 14 includes a top limiting plate 141 and a sidelimiting plate 142 provided at a side of the top limiting plate 141while being bent. The top limiting portion covers a top of the groove132, and the side limiting plate 142 covers a side of the groove 132facing away from the cavity 131, thereby forming the limiting groove 11.In this embodiment, an even number of limiting grooves 11 are provided,and the even number of limiting grooves 11 are symmetrically arranged attwo opposite sides of the bearing frame 10. In this embodiment, thenumber of the limiting arms 211 is equal to the number of the limitinggrooves 11, and the limiting arms 211 are in one-to-one correspondenceswith the limiting grooves 11.

As an example, the base 13 includes a horizontal support plate 133, avertical support plate 134, and two side plates 135. The verticalsupport plate 134 extends from an end of the horizontal support plate133 while being bent upwards. Each of the two side plates 135 isprovided between one side edge of the horizontal support the plate 133and one side edge of the vertical support plate 134 that are opposite toeach other, and the horizontal support plate 133, the vertical supportplate 134, and the two side plates 135 define the cavity 131. Thegrooves 132 are formed in the two side plates 135, and the limitingcovers 14 one-to-one corresponding to the grooves 132 are mounted to thetwo side plates 135 to form the limiting grooves 11.

With further reference to FIG. 2 and FIG. 10, the bearing frame 10further includes a protrusion 15 provided in the cavity 131. Thesupporting-restoring assembly 20 is rotatably connected to theprotrusion 15. The shape memory alloy wires 40 are spaced apart fromeach other and distributed around the protrusion 15. The shape memoryalloy wires 40 include a first shape memory alloy wire 41, a secondshape memory alloy wire 42, a third shape memory alloy wire 43 and afourth shape memory alloy wire 44. The shape memory alloywire-supporting frame 21 includes two first side edges 212 that arespaced apart from each other, and two second side edges 213 that arespaced apart from and opposite to each other and are perpendicularlyconnected to the two first side edges 212. The limiting arms 211 areprovided at the two first side edges 212. The first shape memory alloywire 41 is connected between one first side edge 212 and one side plate135, and the second shape memory alloy wire 42 is connected between theother first side edge 212 and the other side plate 135. The third shapememory alloy wire 43 is connected between one second side edge 213 andthe horizontal support plate 133, and the fourth shape memory alloy wire44 is connected between the other second side edge 213 and the verticalsupport plate 134.

In this embodiment, a top of the protrusion 15 includes an inclinedsurface 151 inclined relative to both the horizontal support plate 133and the vertical support plate 134. The supporting-restoring assembly 20uses the inclined surface 151 as a rotation connection fulcrum. Thefirst shape memory alloy wire 41 and the second shape memory alloy wire42 are respectively connected to the shape memory alloy wire-supportingframe 21 and the bearing frame 10 from the two first side edges 212, soas to drive the shape memory alloy wire-supporting frame 21 to drive thedrive the prism 30 to rotate about a first rotation center axis, whichis an inclined direction of the inclined surface 151 (a directionindicated by a dotted line M shown in FIG. 1). The third shape memoryalloy wire 43 and the fourth shape memory alloy wire 44 are respectivelyconnected to the shape memory alloy wire-supporting frame 21 and thebearing frame 10 from the two second side edges 213, so as to drive theshape memory alloy wire-supporting frame 21 to drive the prism 30 torotate about a second rotation center axis (a direction indicated by anX axis shown in FIG. 1). That is, the third shape memory alloy wire 43and the fourth shape memory alloy wire 44 are connected to thesupporting-restoring assembly 20 and the bearing frame 10 from thehorizontal support plate 133 and the vertical support plate 134,respectively, so as to drive the supporting-restoring assembly 20 todrive the prism 30 to rotate about the second rotation center axis,which perpendicularly intersects the first rotation center axis.

With reference to FIG. 4 and FIG. 9, as an example, the bearing frame 10further includes two first locating rods 161 respectively protrudingfrom the two side plates 135 and provided in the cavity 131, a secondlocating rod 162 protruding from the horizontal support plate 133 andprovided in the cavity 131, and a third locating rod 163 protruding fromthe vertical support plate 134 and provided in the cavity 131. The shapememory alloy wire-supporting frame 21 further includes a main plate body214 rotatably connected to the protrusion 15, and a plurality ofconnecting terminals 23 provided at an outer edge of the main plate body214 and connected to the shape memory alloy wire 40. The limiting arms211 are provided at the outer edge of the main plate body 214. Theconnecting terminals 23 include two first connecting terminals 231spaced apart from each other and mounted to one first side edge 212, twosecond connecting terminal 232 spaced apart from each other and mountedto the other first side edge 212, two third connecting terminals 233spaced apart from each other and mounted to one second side edge 213,and two fourth connecting terminals 234 spaced apart from each other andmounted to the other second side edge 213. Each connecting terminal 23is inclined and protrudes from a side of the main plate body 214 facingaway from the cavity 131, so as to form a receiving groove for receivingthe holder 222, the elastic bracket 221 and the prism support 223. Thefirst shape memory alloy wire 41 includes a middle portion hooked to onefirst locating rod 161, and two ends fixed to the first connectingterminals 231 of the shape memory alloy wire-supporting frame 21. Thesecond shape memory alloy wire 42 includes a middle portion hooked tothe other first locating rod 161, and two ends fixed to the secondconnecting terminals 232 of the shape memory alloy wire-supporting frame21. The third shape memory alloy wire 43 includes a middle portionhooked to the second locating rod 162, and two ends fixed to the thirdconnecting terminals 233 of the shape memory alloy wire-supporting frame21. The fourth shape memory alloy wire 44 includes a middle portionhooked to the third locating rod 163, and two ends fixed to the fourthconnecting terminals 234 of the shape memory alloy wire-supporting frame21. In this way, each shape memory alloy wire 40 is formed into a “V”shape.

With further reference to FIG. 8, for example, each of the firstlocating rod 161, the second locating rod 162, and the third locatingrod 163 is a stepped rod 16. The stepped rod 16 includes a first rodbody 164, a second rod body 165, and a third rod body 166. The first rodbody 164 is connected to the bearing frame 10, and the second rod body165 is disposed between the first rod body 164 and the third rod body166. Each of the first rod body 164 and the third rod body 166 has alarger outer diameter than the second rod body 165. The middle portionof each shape memory alloy wire 40 is hooked to the second rod body 165of a corresponding stepped rod 16, thereby preventing the shape memoryalloy wire 40 from falling off during shaking. Meanwhile, the steppedrod 16 may be directly formed onto the base 13 into one piece or beassembled to the base 13 by means of any existing assembling method. Inthis embodiment, the stepped rod 16 is mounted to the base 13, which cansimplify a structure of the bearing frame 10 and reduce a manufacturingcost for the bearing frame 10.

The prism device 1 applied to the periscope lens module further includesa ball 50, and the shape memory alloy wire-supporting frame 21 isrotatably connected to the bearing frame 10 through the ball 50. Theincident surface 151 is provided with a locating groove 152 forreceiving and locating the ball 50, and the locating groove 152 isformed in a surface of the protrusion 15 facing towards the shape memoryalloy wire-supporting frame 21. A spherical arc recess 215 for matchingthe ball 50 is provided at a side of the shape memory alloywire-supporting frame 21 facing towards the bearing frame 10. Thesupporting-restoring assembly 20 rotates about the protrusion 15 byusing the ball 50 as a rotation connection fulcrum.

As an example, the prism device 1 applied to the periscope lens modulefurther includes a magnet 60, and the protrusion 15 is provided with amounting groove 153 located between the locating groove and a bottom ofthe protrusion 15. The prism support 223 for fixing the prism 30 at thetop of the supporting-restoring assembly 20 is made of a metal, and themagnet 60 is received and located in the mounting groove 153 forattracting and locating the ball 50 and the prism support 223, so as toachieving mounting and fixing of the supporting-restoring assembly 20and the ball 50.

In this embodiment, a spherical arc boss 216 is further provided at aside of the main plate body 214 facing towards the prism 30, and thespherical arc recess 215 is formed by recessing and extending from aside of the main plate body 214 facing towards the bearing frame 10 tothe spherical arc boss 216. The holder 222 is provided with a firstavoiding hole 229 for avoiding the spherical arc boss 216, and theelastic bracket 221 is provided with a second avoiding hole 230 foravoiding the spherical arc boss 216. In this way, the holder 222 and theelastic bracket 221 can be roughly located onto the shape memory alloywire-supporting frame 21. The prism support 223 is provided with nohole, so as to avoid interfering with imaging of the prism 30.

For the prism device 1 applied to the periscope lens module of thepresent invention, a plurality of shape memory alloy wires 40 are usedto drive the prism 30 on the supporting-restoring assembly 20 to rotatein the bearing frame 10 about the first rotation center axis or aboutthe second rotation center axis, so that the prism 30 can automaticallycorrect an angle under driving of the shape memory alloy wires 40.Therefore, the prism device 1 applied to the periscope lens module has awider imaging angle and a better imaging effect. The shape memory alloywire 40 can form a memory effect under a command issued by the programto generate a driving force.

In a specific operation, as shown in FIG. 1, when the first shape memoryalloy wire 41 is energized to be heated and shortened, thesupporting-restoring assembly 20 is applied with an obliquely downwardpulling force, so that the supporting-restoring assembly 20 rotates inone direction about the axis indicated by the dotted line M by using theball 50 as the fulcrum. When the second shape memory alloy wire 42 isenergized to be heated and shortened, the prism 30 rotates relative tothe fixing base in an opposite direction about the axis indicated by thedotted line M. When the third shape memory alloy wire 43 is energized tobe heated and shortened, the prism 30 can rotate relative to the fixedbase in one direction about the X axis. When the fourth shape memoryalloy wire 44 is energized to be heated and shortened, the prism 30 canrotate relative to the fixed base in an opposite direction about the Xaxis. The shape memory alloy wire 40 of the present invention may alsobe referred to as an SMA wire, which will not be described in detailsherein.

With reference to FIG. 12, the present invention further provides aperiscope lens module, including a shell frame 70, a lens device 80, animage sensor 90, and the prism device 1 applied to the periscope lensmodule as described above. The lens device 80 is mounted to a middleportion of the shell frame 70. The image sensor 90 is mounted to an endof the shell frame 70 and located at an image side of the lens device80. The prism device 1 applied to the periscope lens module is mountedto the other end of the shell frame 70 and located at an object side ofthe lens device 80. Light is reflected by the prism device 1 applied tothe periscope lens module and then reaches the image sensor 90 in astraight-line direction along the axis of the lens device 80, so as toachieve imaging. The dotted line shown in FIG. 12 is a lighttransmission direction. The periscope lens module can be applied to anelectronic device with an imaging function. For example, the electronicdevice with the imaging function is a mobile phone or a camera.

The above description merely illustrates some embodiments of the presentinvention. It should be noted that those skilled in the art can makeimprovements without departing from a creative concept of the presentinvention, but all these improvements shall fall into a scope of thepresent invention.

What is claimed is:
 1. A prism apparatus applied to a periscope lensmodule, comprising: a bearing frame; a supporting-restoring assemblyrotatably mounted on the bearing frame; a prism mounted on thesupporting-restoring assembly and rotatable with thesupporting-restoring assembly; and a plurality of shape memory alloywires connected between the bearing frame and the supporting-restoringassembly and configured to drive the supporting-restoring assembly andthe prism to rotate with respect to the bearing frame, wherein thesupporting-restoring assembly comprises a shape memory alloywire-supporting frame rotatably connected to the bearing frame, and anelastic support member disposed between the shape memory alloywire-supporting frame and the prism and elastically connected to thebearing frame, the prism is mounted on the elastic support member, andthe plurality of shape memory alloy wires is connected between thebearing frame and the shape memory alloy wire-supporting frame, theelastic support member comprises an elastic bracket elasticallyconnected to the bearing frame, a holder disposed between the elasticbracket and the shape memory alloy wire-supporting frame, and a prismsupport disposed on a side of the elastic bracket facing away from theholder, and wherein the prism is mounted on the prism support.
 2. Theprism apparatus applied to a periscope lens module as described in claim1, wherein the elastic bracket comprises a base plate, and a pluralityof elastic arms disposed at outer edges of the base plate and connectedto the bearing frame, and wherein the base plate is sandwiched betweenthe holder and the prism support.
 3. The prism apparatus applied to aperiscope lens module as described in claim 2, wherein each of theplurality of elastic arms comprises a first fixed end fixed to one ofthe outer edges of the base plate, a second fixed end configured to beconnected to the bearing frame, and an elastic bent portion being bentand connected between the first fixed end and the second fixed end, andwherein the bearing frame is provided with a snap groove for receivingand locating the second fixed end.
 4. The prism apparatus applied to aperiscope lens module as described in claim 1, further comprising aball, wherein the shape memory alloy wire-supporting frame is rotatablyconnected to the bearing frame through the ball, a locating groove isprovided in the bearing frame to receive and locate the ball, and aspherical arc recess for matching the bass is provided at a side of theshape memory alloy wire-supporting frame facing towards the bearingframe.
 5. The prism apparatus applied to a periscope lens module asdescribed in claim 4, wherein the shape memory alloy wire-supportingframe comprises a main plate body, a spherical arc boss provided at aside of the main plate body facing towards the prism, a plurality oflimiting arms provided at outer edges of the main plate body and movablysnapped and inserted in the bearing frame, and a plurality of terminalsprovided at the outer edges of the main plate body and configured to beconnected to the plurality of shape memory alloy wires, and wherein thespherical arc recess is formed by recessing and extending from a side ofthe main plate body facing towards the bearing frame to the sphericalarc boss, the holder is provided with a first avoiding hole for avoidingthe spherical arc boss, and the elastic bracket is provided with asecond avoiding hole for avoiding the spherical arc boss.
 6. The prismapparatus applied to a periscope lens module as described in claim 5,further comprising a magnet, wherein the bearing frame comprises a basehaving a cavity and a protrusion provided in the cavity, the locatinggroove is formed in a surface of the protrusion facing towards the shapememory alloy wire-supporting frame, and the protrusion is provided witha mounting groove located between the locating groove and a bottom ofthe protrusion, and wherein the magnet is received and located in themounting groove for attracting and locating the ball and thesupporting-restoring assembly.
 7. The prism apparatus applied to aperiscope lens module as described in claim 1, wherein the shape memoryalloy wire-supporting frame comprises two first side edges that arespaced apart from each other, and two second side edges that are spacedapart from and opposite to each other and are perpendicularly connectedto the two first side edges, respectively, wherein the plurality ofshape memory alloy wires comprises a first shape memory alloy wire, asecond shape memory alloy wire, a third shape memory alloy wire, and afourth shape memory alloy wire, and wherein the first shape memory alloywire and the second shape memory alloy wire are connected to the shapememory alloy wire-supporting frame and the bearing frame respectivelyfrom the two first side edges, to drive the shape memory alloywire-supporting frame to drive the prism to rotate about a firstrotation central axis; and the third shape memory alloy wire and thefourth shape memory alloy wire are connected to the shape memory alloywire-supporting frame and the bearing frame respectively from the twosecond side edges, to drive the shape memory alloy wire-supporting frameto drive the prism to rotate about a second rotation central axis,wherein the first rotation central axis perpendicularly intersects thesecond rotation central axis.
 8. The prism apparatus applied to aperiscope lens module as described in claim 7, wherein both ends of eachof the plurality of shape memory alloy wires are fixed to the shapememory alloy wire-supporting frame, and a middle portion of each of theplurality of shape memory alloy wires is hooked to the bearing frame insuch a manner that each of the plurality of shape memory alloy wires isformed into a “V” shape.
 9. A periscope lens module, comprising: a shellframe; a lens device mounted to a middle portion of the shell frame; animage sensor mounted to an end of the shell frame and located at animage side of the lens device; and a prism apparatus applied to aperiscope lens module, wherein the prism apparatus comprises: a bearingframe; a supporting-restoring assembly rotatably mounted on the bearingframe; a prism mounted on the supporting-restoring assembly androtatable with the supporting-restoring assembly; and a plurality ofshape memory alloy wires connected between the bearing frame and thesupporting-restoring assembly and configured to drive thesupporting-restoring assembly and the prism to rotate with respect tothe bearing frame, wherein the supporting-restoring assembly comprises ashape memory alloy wire-supporting frame rotatably connected to thebearing frame, and an elastic support member disposed between the shapememory alloy wire-supporting frame and the prism and elasticallyconnected to the bearing frame, the prism is mounted on the elasticsupport member, and the plurality of shape memory alloy wires isconnected between the bearing frame and the shape memory alloywire-supporting frame, and wherein the prism apparatus applied to aperiscope lens module is mounted to the other end of the shell frame andlocated at an object side of the lens device, the elastic support membercomprises an elastic bracket elastically connected to the bearing frame,a holder disposed between the elastic bracket and the shape memory alloywire-supporting frame, and a prism support disposed on a side of theelastic bracket facing away from the holder, and wherein the prism ismounted on the prism support.
 10. The periscope lens module as describedin claim 9, wherein the elastic bracket comprises a base plate, and aplurality of elastic arms disposed at outer edges of the base plate andconnected to the bearing frame, and wherein the base plate is sandwichedbetween the holder and the prism support.
 11. The periscope lens moduleas described in claim 10, wherein each of the plurality of elastic armscomprises a first fixed end fixed to one of the outer edges of the baseplate, a second fixed end configured to be connected to the bearingframe, and an elastic bent portion being bent and connected between thefirst fixed end and the second fixed end, and wherein the bearing frameis provided with a snap groove for receiving and locating the secondfixed end.
 12. The periscope lens module as described in claim 9,further comprising a ball, wherein the shape memory alloywire-supporting frame is rotatably connected to the bearing framethrough the ball, a locating groove is provided in the bearing frame toreceive and locate the ball, and a spherical arc recess for matching thebass is provided at a side of the shape memory alloy wire-supportingframe facing towards the bearing frame.
 13. The periscope lens module asdescribed in claim 12, wherein the shape memory alloy wire-supportingframe comprises a main plate body, a spherical arc boss provided at aside of the main plate body facing towards the prism, a plurality oflimiting arms provided at outer edges of the main plate body and movablysnapped and inserted in the bearing frame, and a plurality of terminalsprovided at the outer edges of the main plate body and configured to beconnected to the plurality of shape memory alloy wires, and wherein thespherical arc recess is formed by recessing and extending from a side ofthe main plate body facing towards the bearing frame to the sphericalarc boss, the holder is provided with a first avoiding hole for avoidingthe spherical arc boss, and the elastic bracket is provided with asecond avoiding hole for avoiding the spherical arc boss.
 14. Theperiscope lens module as described in claim 13, further comprising amagnet, wherein the bearing frame comprises a base having a cavity and aprotrusion provided in the cavity, the locating groove is formed in asurface of the protrusion facing towards the shape memory alloywire-supporting frame, and the protrusion is provided with a mountinggroove located between the locating groove and a bottom of theprotrusion, and wherein the magnet is received and located in themounting groove for attracting and locating the ball and thesupporting-restoring assembly.
 15. The periscope lens module asdescribed in claim 9, wherein the shape memory alloy wire-supportingframe comprises two first side edges that are spaced apart from eachother, and two second side edges that are spaced apart from and oppositeto each other and are perpendicularly connected to the two first sideedges, respectively, wherein the plurality of shape memory alloy wirescomprises a first shape memory alloy wire, a second shape memory alloywire, a third shape memory alloy wire, and a fourth shape memory alloywire, and wherein the first shape memory alloy wire and the second shapememory alloy wire are connected to the shape memory alloywire-supporting frame and the bearing frame respectively from the twofirst side edges, to drive the shape memory alloy wire-supporting frameto drive the prism to rotate about a first rotation central axis; andthe third shape memory alloy wire and the fourth shape memory alloy wireare connected to the shape memory alloy wire-supporting frame and thebearing frame respectively from the two second side edges, to drive theshape memory alloy wire-supporting frame to drive the prism to rotateabout a second rotation central axis, wherein the first rotation centralaxis perpendicularly intersects the second rotation central axis. 16.The periscope lens module as described in claim 15, wherein both ends ofeach of the plurality of shape memory alloy wires are fixed to the shapememory alloy wire-supporting frame, and a middle portion of each of theplurality of shape memory alloy wires is hooked to the bearing frame insuch a manner that each of the plurality of shape memory alloy wires isformed into a “V” shape.